A Nationwide Assessment of the Burden of Urinary Tract Infection among Renal Transplant Recipients

Table 4

Multivariable negative binomial incidence rate ratio (and 95% CI) for length of stay among renal transplant recipients, NIS 2009–2011.

	Men		Women
	IRR (95% CI)	value	IRR (95% CI)	value
UTI versus no UTI	1.87 (1.50, 2.33)	<0.001^*	1.74 (1.55, 1.97)	<0.001^*
Deceased donor versus live	1.31 (1.24, 1.39)	<0.001^*	1.26 (1.16, 1.37)	<0.001^*
Age (Ref. = 18–34 years)
35–49 years	1.06 (1.00, 1.12)	0.05	0.95 (0.88, 1.02)	0.15
50–64 years	1.00 (0.93, 1.07)	0.95	0.93 (0.86, 0.99)	0.03
65 years or more	1.15 (1.03, 1.28)	0.01	0.98 (0.90, 1.07)	0.64
Race/ethnicity (Ref. = White)
Black	1.07 (0.99, 1.16)	0.07	1.02 (0.95, 1.10)	0.53
Hispanic	0.99 (0.90, 1.07)	0.76	1.01 (0.92, 1.11)	0.84
Others	0.96 (0.88, 1.04)	0.32	0.93 (0.85, 1.01)	0.09
Charlson-Deyo index 3 or more versus 2 or less	1.16 (1.11, 1.21)	<0.001^*	1.16 (1.11, 1.22)	<0.001^*
Neighborhood income (Ref. = $1–$38,999)
$39,000–$47,999	0.99 (0.93, 1.05)	0.71	0.99 (0.92, 1.06)	0.74
$48,000–$62,999	1.00 (0.93, 1.08)	0.98	1.01 (0.93, 1.11)	0.74
$63,000 or more	0.97 (0.88, 1.07)	0.54	1.02 (0.90, 1.16)	0.71
Payer type (Ref. = private including HMO)
Medicare	1.11 (1.05, 1.17)	<0.001^*	1.11 (1.05, 1.17)	<0.001^*
Medicaid	1.21 (1.09, 1.35)	<0.001	1.21 (1.03, 1.43)	0.02
Others	1.03 (0.91, 1.17)	0.66	1.23 (0.94, 1.63)	0.13
Teaching versus nonteaching	0.81 (0.69, 0.95)	0.01	0.78 (0.67, 0.93)	0.01
Geographic location (Ref. = Northeast)
Midwest	0.94 (0.77, 1.14)	0.51	0.95 (0.78, 1.16)	0.63
South	0.97 (0.82, 1.15)	0.71	0.98 (0.80, 1.20)	0.85
West	1.02 (0.87, 1.18)	0.83	1.03 (0.86, 1.22)	0.77
Year (Ref. = 2009)
2010	1.01 (0.89, 1.16)	0.85	1.05 (0.93, 1.19)	0.44
2011	1.04 (0.90, 1.20)	0.63	1.04 (0.89, 1.23)	0.61

Bonferroni < 0.003.
Ref. = reference category, UTI = urinary tract infection, IRR = incidence rate ratio, and CI = confidence interval.